This is one of the major components of the western road network and connecting two important city namely Jeddah & Makkah. The project scope includes the aligment studies for the main road and the preliminary / final design studies in addition to the preparation of the project tender documents.The main expressway comprises of 80 km. / 4 lane dual carriageway and the 8 grade seperated I/C.s serving the nearby settlements. It include about 14 road crossing bridges; 3 wadi bridges, 3 vehcular crossing; and 4 camel crossings. This also comprises the detailed design of the required drainage works and flood protection measures to protect the road alignment against regional flash floods.